Bom and Dara were with “Mr Crow” aka @RJinPeace on Twitter, and so I think that she is referring to him. Kekeke! Besides “Ggagmagui” is “Crow” in Korean, so if that isn’t a dead give-away, then I don’t know what is. Kekekeke! XDDD
Credits:
Source: 2NE1’s Line
Re-uploaded by: OhDara
oh-dara.com 
Comments on: "Line: Happy Dara Reveals that “Mr. Crow” is a Good Singer" (1)
I love the way she said it, yes, laters baby, ke ke ke